NCERT Class 6 Science Chapter 11 Air Around Us Multiple Choice Questions

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Air Around Us Multiple Choice Questions

Question 1. Which of the following statements is incorrect?

  1. All living tilings require air to breathe
  2. We can feel the air, but we cannot see it
  3. Moving air makes it possible to fly a kite
  4. Air is present everywhere, but not in the soil

Answer: 4. Air is present everywhere, but not in soil

Question 2. Wind does not help in the movement of which of the following?

  1. Firki
  2. Weather cock
  3. Ceiling fan
  4. Sailing Yacht

Answer: 3. Ceiling fan

Read and Learn More NCERT Class 6 Science MCQs

NCERT Class 6 Science Chapter 11 Air Around Us MCQs

Question 3. Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

  1. Bubbles of air came out from the bottle.
  2. Some water entered into the bottle.
  3. Nitrogen gas came out in the form of bubbles and oxygen gas dissolved in water.
  4. No bubbles formed, only water entered into the bottle.

Which observation(s) is/are correct?

  1. 1 Only 2
  2. Only 4
  3. 3 Only 4
  4. Only 1

Answer: 1. 1 Only 2

Question 4. Mountaineers carry oxygen cylinders with them because

  1. There is no oxygen in high mountains
  2. Oxygen is deficient in mountains at higher altitude
  3. Oxygen is used for cooking
  4. Oxygen keeps them warm at low temperature

Answer: 2. There is a deficiency of oxygen in mountains at higher altitude

Question 5. What is the function of the atmosphere?

  1. It protects us from smoke and dust particles
  2. It reduces the greenhouse effect
  3. It filters air
  4. It protects us from harmful radiation

Answer: 4. It protects us from harmful radiation

Question 6. The envelope of air that surrounds the Earth is the atmosphere ecosystem

  1. Biosphere
  2. Atmosphere
  3. Environment
  4. Ecosystem

Answer: 2. Atmosphere

Question 7. Which of the following components of air is present in the largest amount in the atmosphere?

  1. Nitrogen
  2. Oxygen
  3. Water vapour
  4. Carbon dioxide

Answer: 3. Water vapour

Question 8. About one-fifth of ordinary air is

  1. Nitrogen
  2. Carbon dioxide
  3. Water vapour
  4. Oxygen

Answer: 4. Oxygen

Question 9. The incorrect statement is

  1. Air is a mixture of gases
  2. The composition of oxygen in the air is maximum.
  3. The envelope of air that surrounds the Earth is the
  4. Aquatic plants and animals use dissolved oxygen in the water

Answer: 2. The composition of oxygen in the air is maximum.

Question 10. Burning of fuels produces

  1. Oxygen
  2. Carbon dioxide
  3. Dust
  4. Smoke

Answer: 2. Carbon dioxide

Question 11. Which of the statements about air is true?

  1. Air can only be felt
  2. Air occupies space
  3. Air contains nitrogen, oxygen and CO2
  4. All of the above

Answer: 4. All of the above

Question 12. The components of air which are harmful to living beings are

  1. Nitrogen and carbon dioxide
  2. Dust and water vapour
  3. Dust and smoke
  4. Smoke and water vapour

Answer: 3. Dust and smoke

Question 13. Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain

  1. Water vapour
  2. Only oxygen gas
  3. Air
  4. Only nitrogen gas

Answer: 3. Air

Question 14. What is not true about air?

  1. It makes the windmill rotate
  2. It helps in the movement of aeroplanes
  3. Birds can fly due to the presence of air
  4. It has no role in the water cycle

Answer: 4. It has no role in the water cycle

Question 15. Roja blows air through a straw Into a glass of water. Answers She sees bubbles coming out from the straw In the water. What does this show?

  1. Air has mass
  2. Air takes up space
  3. Air can exert pressure
  4. Air contains water vapour

Answer: 2. Air takes up space

Question 16. The component of air that is used by green plants to make their food is

  1. Oxygen
  2. Dust particles
  3. Carbon dioxide
  4. Nitrogen

Answer:  3. Carbon dioxide

Question 17. Name the gas required for breathing.

  1. Nitrogen
  2. Oxygen
  3. Water vapour
  4. Carbon dioxide

Answer: 2. Oxygen

Question 18. If there were no water vapour in the atmosphere, what would get disrupted?

  1. Nitrogen cycle
  2. Photosynthesis
  3. Water cycle
  4. Oxygen cycle

Answer: 1. Nitrogen cycle

Question 19. Oxygen is a supporter of

  1. Combustion
  2. Nitrogen
  3. Smoke
  4. Dust

Answer: 1. Combustion

Question 20. As you go higher, the atmosphere

  1. Gets thicker
  2. Gets thinner
  3. Remains the same
  4. Gets dusty

Answer: 2. Gets thinner

Question 21. Sumit wants to find out if burning takes place only in the presence of air. He places a burning candle inside each of the four inverted glasses

Class 6 Science Chapter 11 Air Around Us Water Four Inverted Glass

1. Inside which glass will the candle stop burning last?

  1. Glass 1
  2. Glass 2
  3. Glass 3
  4. Glass 4

Answer: 3. Glass 3

2. Which of these shows that air contains water vapour?

  1. Steam is produced when water Is heated
  2. Road surfaces shine on hot summer days
  3. Dew appears on plant leaves on winter nights
  4. Tiny particles shine in a narrow beam of sunlight

Answer: 3. Dew appears on plant leaves on winter nights

Question 22. See the following image and answer the questions given below.

Class 6 Science Chapter 11 Air Around Us Evaporation

Answer:

1. The component required to carry vapours into the upper atmosphere is

  1. Nitrogen
  2. Dust
  3. Sunlight
  4. Air

Answer: 4. Air

2. The process shown in the image is called

  1. Oxygen cycle
  2. Air cycle
  3. Water cycle
  4. Environmental cycle

Answer: 3. Water cycle

Question 23. Rohan performed an activity as follows

He put a burning candle inside an inverted glass A in a jar B full of water. The water rose in glass A after the candle was extinguished. He then, tried the same activity with a taller glass B. Answer the following questions regarding the observation

1. Water will rise

  1. To equal levels in both glasses
  2. Higher in glass A than in glass B
  3. Higher in glass B than in glass A
  4. Will not rise in glass B

Answer: 3. Higher in glass B than in glass A

2. The activity shows that

  1. There are many components in air
  2. Air does not support burning
  3. Some components of air are fixed in quantity
  4. Air has pressure

Answer: 3. Some components of air are fixed in quantity

Question 24. The picture shows trekkers at four different locations on a mountain.  The picture shows trekkers at four different locations on a mountain

Class 6 Science Chapter 11 Air Around Us PQRS And S AreThe Four Different Locations

At which location will a trekker need maximum oxygen from the cylinder?

  1. P
  2. Q
  3. R
  4. S

Answer: 4. S

Question 25. Wearing a face mask prevents germs present in the air from entering our bodies. What is another benefit of wearing a face mask?

  1. It prevents the drying of lips
  2. It helps to reduce bad breath
  3. It helps to keep the face warm
  4. It prevents dust from entering the body

Answer:  4. It prevents dust from entering the body

Question 26. Which is the largest component of air?

  1. Oxygen
  2. Nitrogen
  3. Water vapour
  4. Carbon dioxide

Answer: 2. Nitrogen

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